Measurement of iron self-diffusion in hematite single crystals by sims and comparison of cation self-diffusion in corundum-structure oxides.

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dc.contributor.authorSabioni, Antônio Claret Soares
dc.contributor.authorHuntz, Anne Marie
dc.contributor.authorDaniel, Antônio Márcio J. Mucci
dc.contributor.authorMacedo, Waldemar Augusto de Almeida
dc.date.accessioned2012-07-13T16:08:55Z
dc.date.available2012-07-13T16:08:55Z
dc.date.issued2005
dc.description.abstractIron bulk self-diffusion coefficients were measured in Fe2O3 single crystals using an original methodology based on the utilization of 57Fe stable isotope as iron tracer, and depth profiling by secondary ion mass spectrometry (SIMS). The iron self-diffusion coefficients were measured along and perpendicular to c-axis direction, between 900 and 1100o C, in oxygen atmosphere. Along caxis they can be described by D//c (cm2/s)= 5.2x106 exp [-510 (kJ/mol)/RT], and are close to reliable data available in the literature, obtained by means of radioactive techniques. Perpendicular to c-axis, D⊥c (cm2/s)= 83 exp [-430 (kJ/mol)/RT], and the coefficients are smaller than coefficients along caxis. The results are compared with previously obtained results of cation bulk self-diffusion in Cr2O3 and in Al2O3 single crystals.pt_BR
dc.identifier.citationSABIONI, A. C. S. et al. Measurement of iron self-diffusion in hematite single crystals by sims and comparison of cation self-diffusion in corundum-structure oxides. Philosophical Magazine, v. 85, n. 31, p. 3643-3658, nov. 2005. Disponível em: <https://www.tandfonline.com/doi/abs/10.1080/14786430500323795>. Acesso em: 13 jul. 2012.pt_BR
dc.identifier.issn14786443
dc.identifier.urihttp://www.repositorio.ufop.br/handle/123456789/1123
dc.identifier.uri2https://www.tandfonline.com/doi/abs/10.1080/14786430500323795
dc.language.isoen_USpt_BR
dc.subjectHematitept_BR
dc.subjectSelf-diffusionpt_BR
dc.subjectAnisotropypt_BR
dc.subjectSingle crystalspt_BR
dc.titleMeasurement of iron self-diffusion in hematite single crystals by sims and comparison of cation self-diffusion in corundum-structure oxides.pt_BR
dc.typeArtigo publicado em periodicopt_BR
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